Brooks Instrument 3809E12A4DAA1A1 Metal-Tube Variable-Area Flow Meter
About this part
The MR3809 record corresponds to a legacy Brooks Instrument MT3809E-series metal-tube variable-area flow meter carrying configured model code 3809E12A4DAA1A1. The code identifies a size-8, 316/316L stainless-steel, 1/2-inch JIS B 0203/Rc threaded gas meter with Viton sealing, a direct-reading ±1%-of-full-scale mechanical indicator, and no encoded transmitter or alarm. The observed unit is scaled for air at 20°C and 8 bar(g); its exact calibrated range is not established by the available label transcription
Configurations vary. Verify the exact unit before choosing a replacement.
Application classIndustrial automation and process equipment
CategoryFlow Control
Specifications
Identification
Manufacturer
Brooks Instrument, LLC
Official product family
MT3809E Series (legacy)
Configured model code
3809E12A4DAA1A1
Measurement
Meter type
All-metal variable-area flow meter with magnetically coupled mechanical pointer indication
Configured fluid/scale
Gas service with direct-reading scale; observed unit is marked for air at 20°C and 8 bar(g)
Performance
Configured accuracy
±1% of full scale (ordering-code value D)
Repeatability
0.25% of full scale (MT3809E family specification)
Construction
Wetted construction
316/316L stainless steel body, float, and fittings (ordering-code value 1)
Meter size
Size 8 with standard 1/2-inch connection (ordering-code value 2)
Connections
Process connection
1/2-inch JIS B 0203 threaded connection with Viton O-ring; observed label transcription identifies Rc female
Documented seal temperature limit
Up to 177°C (350°F) for ordering-code connection value 4
Indicator
Configuration
Standard aluminum housing with polyurethane finish; mechanical indicator only (ordering-code value A)
Enclosure
NEMA 4X construction (MT3809E family specification)
Electrical
Transmitter and alarms
None encoded
Relay/power supply
None encoded
Options
Optional certification
No optional certificate encoded; this does not negate general product compliance markings
Accessories
None encoded
Installation
Required orientation
Bottom inlet and top outlet, installed within 5° of true vertical
What Does MR3809 Mean?
MR3809 is the record identifier. The manufacturer ordering code associated with the observed unit is 3809E12A4DAA1A1.
Segment
Field
Interpretation
MR3809
Record identifier
Identifier used for this record; it is not defined in the Brooks MT3809E ordering-code table.
3809E
Basic model
Thru-flow metal-tube variable-area flow meter with threaded or flanged connections.
1
Materials
316/316L stainless steel body, float, and fittings.
2
Meter and connection size
Meter size 8 with standard 1/2-inch connection; the female-threaded version has a documented 225 mm lay length.
A
Maximum-flow selection
Size-8 tube/float capacity selection A. Standard-condition capacity-table values do not establish this unit's calibrated air scale at 20°C and 8 bar(g).
4
Connection type
JIS B 0203 threaded connection with Viton O-ring; documented for sizes 7–13 and temperatures up to 177°C.
D
Accuracy, scale, and fluid
±1% full-scale accuracy with a direct-reading gas scale.
A
Indication configuration
Standard aluminum housing, polyurethane finish, indicator only.
A
Relay/power supply
None.
1
Optional certification
None encoded.
A
Accessory
None.
1
Software revision
Not applicable because the meter has no microprocessor transmitter.
Legacy Status and Replacement
Brooks lists the MT3809E Series as a legacy metal-tube variable-area flow meter and links the current MT3809 Series as its replacement product family.
Legacy seriesMT3809E Series
Current replacement familyMT3809 Series / 3809G
Compatibility boundaryReplacement selection must account for the full ordering code, 225 mm lay length, Rc connection, seal material, air calibration, operating pressure, and temperature. Current 3809G ratings must not be back-applied to this 3809E unit.
Installation and Service Notes
Install vertically with the process inlet at the bottom and outlet at the top, within 5° of true vertical.
Use the unit's actual scale and calibration data for gas flow; nominal capacity-table values are not substitutes for the air calibration at 20°C and 8 bar(g).
Verify the physical nameplate pressure limit before operation because the available legacy pressure table does not explicitly substantiate the transcribed 173 bar Rc-threaded rating.
Isolate, depressurize, and drain the meter before removal or service.
